Add ChangeLog for PSA buffer sharing fix
Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/ChangeLog.d/psa-shared-memory-protection.txt b/ChangeLog.d/psa-shared-memory-protection.txt
new file mode 100644
index 0000000..f4f6ea0
--- /dev/null
+++ b/ChangeLog.d/psa-shared-memory-protection.txt
@@ -0,0 +1,8 @@
+Security
+ * Support calling PSA functions with buffer arguments that are in memory
+ shared with an untrusted party. The PSA core now makes copies of all
+ buffers before passing them to drivers to protect drivers against
+ modification of buffers during operations.
+ This feature increases code-size and memory usage. If buffers passed to
+ PSA functions are all trusted, buffer copying may be disabled by
+ unsetting MBEDTLS_PSA_COPY_CALLER_BUFFERS.